====== CSS Position absolute relative to a container ======
If you are here it's because probably you are looking for the reason why your inner div don't obey to your "right:0" or similar absolute positioning command relative to the upper div.

Say we have
double indent,<code html>
<div id="a">
	<div id="b"></div>
</div>
</code>

<code css>
#b{position:absolute;right:0}
//it works only if...
#a{position:relative}
</code>

So the secret it's just having the container set as position:relative.